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SWRCB, January 2002 Page z-9 of 4. TANK ANNULAR TESTING Test Method Developed By: X Tank Manufacturer ❑ Industry Standard ❑ Professional Engineer ❑ Other (Spec) Test Method Used: ❑ Pressure X Vacuum 0 Hydrostatic ❑ Other (Sped) Test Equipment Used: Gast Vacuum Pump/Vacuum Gauges in Fig. Equipment Resolution: -0/-30 Fig. Is Tank Exempt From Testing?' Tank # 1 Yes x No Tank # 2 Yes x No Tank # 3 Yes x No Tank # ❑ Yes ❑ No Tank Capacity: 12K 12K 12K Tank Material: Fiberglass Fiberglass Fiberglass Tank Manufacturer: Owens Corning Owens Corning Owens Corning Product Stored: Regular 87 Master Regular 87 Slave Premium 91 Wait time between applying vacuum and starting test: 1 Hour I Hour I Hour Test Start Time: 11:15 11:25 11:35 Initial Reading (Rj): -10 Hg. -10 Hg. -10 Hg. Test End Time: 12:15 12:25 12:35 Final Reading (RF): -10 Hg. -10 Hg. -10 Hg. Test Duration: 1 Hour 1 Hour 1 Hour Change in Reading (RF-Rj): 0 0 0 Pass/Fail Threshold or Criteria: ➢ -2 Hg. ➢ -2 Hg. ➢ -2 Fig. Test Result: X Pass ❑ Fail X Pass ❑ Fail X Pass ❑ Fail ❑ Pass ❑ Fail Was sensor removed for testing? Yes X No ❑ NA Yes X No ❑ NA Yes X No 0 NA ❑ Yes ❑ No ❑ NA Was sensor properly replaced and verified functional after testing? Yes ❑ No X NA Yes 0 No X NA Yes 0 No X NA ❑ Yes 0 No ❑ NA Comments — (include information on repairs made prior to testing, and recommended follow-up for failed tests) ' Secondary containment systems where the continuous monitoring automatically monitors both the primary and secondary containment, such as systems that are hydrostatically monitored or under constant vacuum, are exempt from periodic containment testing. {California Code of Regulations, Title 23, Section 2637(a)(6))